Expansion joint



2 Sheets-Sheet l Feb- 27, 1934- H. N. HENDERSON EXPANSION JOINTvOriginall Filed May 2, 1931 Inventor /ndefson Home y Feb. 27, 1934.

EXPANS ION JOINT Original Filed May 2, 1951 `/qliorney H. N. HENDERsoN l1,948,916. l

Tatented Feb. 27, 1934 UNITED STATES PATENT OFFICE EXPANSION JOINTApplication May 2, 1931, Serial No. 534,671 Renewed November 22, 1933 1Claim. I (Cl. SPL-17) material to permit relative expansion and con--Atraction of said concrete sections, whereby to provide a more dependableroad construction and to decidedly prolong the life of the road. `I: Thepresent invention has reference to an improved expansion joint structurecomposed of a pair of duplicate parts arranged together in longitudinalalinement and in end to end abutting relationship, said parts beingconstructed of telescopically connected companion sections intended tooperate in conjunction with one another to compensate for relativemovement between the' concrete road sections caused by expansion andcontraction.

In carrying the inventive conception into practice, I have provided asimple, economical and emcient expansion joint structure which, it isbelieved, is a novel contribution to the prior art, and a decidedimprovement in the industry and is capable of fulfilling therequirements of a structure oi' this class in a. highly satisfactory andpractical manner.

ln the drawings: Figure 1 is a side elevational view of a com- 113 pleteexpansion joint structure developed in accordance with the presentinvention showing the same fastened in the road bed.

Figure 2 is a top plan view thereof.

Figure 3 is a longitudinal sectional view taken on the plane of the line3-3 of Figure 2.

Figure 4 is a transverse vertical section on the line 4-4 of Figure 1.

Figure 5 is an end view.

The improved expansion joint herein illustrated and described is asubstantially all-metal construction xnade up of separable parts tofacilitate transportation and installation.

For example in Figures 1 and 2 it will be obm served that the completejoint structure when assembled is of longitudinal elongatedconfiguration in top plan view, and it is made of a left hand part and aright hand part with said parts having their adjacent ends in abuttingrelationship to i@ provide for the desired continuity and to facilitatehandling when embedding the structure in the road bed.

It is obvious however that the structure may be continuous from end toend, that is, not separated at the center. Each of these parts is in .oturn composed of interlitting telescopically connected companionsections 6 and 7 each section being channel-shaped in cross sectionalconfiguration whereby to permit the anges 8 of the section 7 to littelescopically Within the'anges u 9 of the section 6 as detailed inFigure 4. This arrangement allows the sections to slide one within theother to compensate for expansion and contraction of the road blocks orsections. v

'Ihe complete height of the sections 6 and 7 is 70 such as to permit thetraction portion to occupy a plane substantially even with the tractionsurfaces of the road sections. At its outer end the section 7 isprovided with a corner ear 10 and an end cover plate 11 is secured tothis by a screw or suitable fastening as at 12.

The outer walls or web portions of these sections are provided atlongitudinally spaced points with complemental pairs of verticallyalined eyebolts 13 intended to accommodate anchoring stakes 14 which aredriven down to the road bed as seen in Figure 1. These eye-bolts andtheir stakes 14 may be employed at the time of installing the expansionjoint structure and removed after it has become partly set in theconcrete.

In addition, the sections 6 and 7 are provided with outstandinghorizontal anchoring pins or bolts 15 having their inner threaded endsextending through openings in the web portions 6 and 7 with retainingnuts 16 and 17 on said threaded portions to hold the bolts in place.These bolts are obviously imbedded in the concrete to maintainthesections and parts of the structure in assembled relationship and at thesame time to permit the desired telescoping action essential in g5compensating for the expansion and contraction action of the concreteroadblock section.

The gist of the idea is predicated upon an allmetal structure whereinthe longitudinally alined parts are arranged in end-to-end abuttingrelationship to provide a substantially hollow elongated boxlike i'lllerdisposed in the gap or space between the road sections. Thesecomplemental parts are composed of companion telescopically connectedrelatively slidable sections fastened to 105 the respective sections ofthe concrete road block by way of the bolts l5.

Then too, the utilization .of the eye-bolts 13 and the associatedmaintenance stakes 14 is a structural distinction. Moreover, the use ofthe cover 110 plates 11 and the ends of these box-like parts with thesingle anchoring point as at 10 and 12 is also important as' this allowsthe sections 6 and 7 to have the relative intertting and slidable actionwith respect to each other.

It is thought that the description taken in connection with the drawingswill enable a clear understanding of the invention to be had. Therefore,a more lengthly description is thought unnecessary.

While the preferred embodiment of the invention has been shown anddescribed, it is to be understood that minor changes coming withinneef-:,916

the eld of invention claimed may be resorted -if desired. Y

I claim: I An expansion joint structure of the class dey scribedcomprising a longitudinally elongated las

